package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //  后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /*
    *
    *新增员工
    * employeeDTO 接收页面提交的员工数据
    * DTO传给后端建议还是使用实体对象
    * */
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //对象属性拷贝  简化set方法
        //将employeeDTO中的属性拷贝到employee中
        BeanUtils.copyProperties(employeeDTO,employee);
        //拷贝完成后 employee中属于更多所以要自己手动设置
        //设置账号状态，默认正常状态 1正常 0锁定
        employee.setStatus(StatusConstant.ENABLE);

        //设置密码，默认密码123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
/*                       设置了 AutoFillAspect 自动填充  所以不用再手动设置了
        //设置创建时间和修改时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        //设置当前记录的创建时间和修改时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        //设置当前记录的创建人id和修改人id
        //todo 这里应该是拿到登录用户的id  使用了ThreadLocal来实现
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());*/

        //持久层将员工数据插入到数据库
        employeeMapper.insert(employee);

    }


    /*
    * 分页查询
    * */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //select * from employee  limit 0,10;
        //开始分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        //查询数据
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);

        long total = page.getTotal();
        List<Employee> records = page.getResult();
        //返回分页结果
        return new PageResult(total,records);
    }


    /*
     * 启用 禁用员工账号
     * @param status
     * @param id
     * */
    @Override
    public void startOrStop(Integer status, Long id) {
        //update employee set status = ? where id = ?

        //构建实体对象
 /*       //传统写法
        Employee employee = new Employee();
        employee.setId(id);
        employee.setStatus(status);*/
        // 构建器模式
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .build();
        //调用持久层
        employeeMapper.update(employee);
    }


    /*
    * 根据ID查询员工信息
    *   @param id
    *   @return
    * */
    public Employee getById(Long id) {


       Employee employee =  employeeMapper.getById(id);
       employee.setPassword("******");//设置密码为****** 再次确保安全
        return employee;
    }


    /*
    * 编辑员工信息
    * @param employeeDTO
    * @return
    * */
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);

/*            已经设置了AutoFillAspect 自动填充  所以不用再手动设置了
        //设置修改时间和修改人
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());*/

        //调用持久层
        employeeMapper.update(employee);
    }


}
